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Properties of the Number -19803

Nineteen Thousand Eight Hundred Three

Basics

Value: -19804 → -19803 → -19802

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 23 × 41

Divisors: 1, 3, 7, 21, 23, 41, 69, 123, 161, 287

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110101011011

Octal: -46533

Duodecimal: -B563

Hexadecimal: -4d5b

Square: 392158809

Square Root: 140.72313242676202

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

3 times 10-gonal (or decagonal) numbers: a(n) = 3·n*(4·n-3). A152767
Squarefree integers m > 1 such that if prime p divides m, then sp(m) >= p and sp(m) == 3 (mod p-1), where sp(m) is the sum of the base p digits of m. A324405
Number of parts unequal to 1 in all partitions of the integer n. Also the difference between the labeled and the unlabeled case of one-element transitions from the partitions of n to the partitions of n+1. A96541
Expansion of (-3·x2 + 94·x - 3)/(x3 - 99·x2 + 99·x - 1). A269552
Numbers n such that φ(n) = φ(n+12) and n is not divisible by 2. A217141
Number of nX1 0..n+1-2 arrays with upper left zero and lower right n+1-2 and each element differing from its horizontal and vertical neighbors by one or two. A265440
Number of nonequivalent dissections of an n-gon into 3 polygons by nonintersecting diagonals rooted at a cell up to rotation. A295622
a(n) is the greatest nonnegative number which has a partition into a triangular number (A000217), a square number (A000290), and a pentagonal number (A000326) in n different ways. A327792
Smallest nonnegative integer that is not the sum of fewer than n signed Lucas numbers. A365907
Number of 4 X n 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing. A224040